import numpy as np
temps = np.random.uniform(10, 35, size=(7, 7))

daily_mean = np.mean(temps, axis=0)
print("每日平均温度：", daily_mean)

city_mean = np.mean(temps, axis=1)
print("各城市平均温度：", city_mean)

print("最高温：", np.max(temps))
print("最低温：", np.min(temps))
print("标准差：", np.std(temps))

log_temps = np.log(temps)
print("对数变换后：\n", log_temps)